EP4522468B1 - Primärdichtung für eine zylindereinheit, zylindereinheit - Google Patents

Primärdichtung für eine zylindereinheit, zylindereinheit

Info

Publication number
EP4522468B1
EP4522468B1 EP23729170.3A EP23729170A EP4522468B1 EP 4522468 B1 EP4522468 B1 EP 4522468B1 EP 23729170 A EP23729170 A EP 23729170A EP 4522468 B1 EP4522468 B1 EP 4522468B1
Authority
EP
European Patent Office
Prior art keywords
wall
lip
radial
housing
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP23729170.3A
Other languages
English (en)
French (fr)
Other versions
EP4522468A1 (de
Inventor
Marco Carrara
Luca MAZZEI
Paolo Sala
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brembo SpA
Original Assignee
Brembo SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Brembo SpA filed Critical Brembo SpA
Publication of EP4522468A1 publication Critical patent/EP4522468A1/de
Application granted granted Critical
Publication of EP4522468B1 publication Critical patent/EP4522468B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/16—Master control, e.g. master cylinders
    • B60T11/232—Recuperation valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/16—Master control, e.g. master cylinders
    • B60T11/236—Piston sealing arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/164—Sealings between relatively-moving surfaces the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
    • F16J15/3236—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips with at least one lip for each surface, e.g. U-cup packings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/02—Fluid-pressure mechanisms
    • F16D2125/08—Seals, e.g. piston seals

Definitions

  • the present invention relates to a primary gasket for a cylinder assembly, as well as to a cylinder assembly for a hydraulic and/or electrohydraulic system of a vehicle.
  • a sealingly movable float inside a hollow cylinder which defines an axial direction A-A, and a radial direction R-R perpendicular to the axial direction.
  • a solution is known form KR20070062258A .
  • the float is axially movable in the hollow cylinder between a resting configuration and at least one advanced configuration to pressurize a fluid, e.g., a brake fluid, in a pressure chamber in the hollow cylinder.
  • a fluid e.g., a brake fluid
  • the pressure chamber When the float is in a resting configuration, the pressure chamber is in fluid communication with a fluid reservoir by means of a supply conduit. When the float is in a resting configuration, the pressure in the pressure chamber is equal to the pressure of the reservoir. When the float advances axially toward the at least one advanced configuration, the pressure chamber and the reservoir are fluidically isolated, allowing the fluid in the pressure chamber to be pressurized.
  • the float is axially movable by sliding tightly on a primary gasket and a secondary gasket which are accommodated in respective housings or grooves, a primary housing and a secondary housing, made in the wall of the hollow cylinder.
  • the primary housing and the secondary housing are made in the wall of the hollow cylinder.
  • the supply conduit leads radially from the hollow cylinder wall into a supply opening arranged between the primary housing and the secondary housing.
  • the secondary gasket is adapted to form a static and dynamic seal between the cylinder and the float to avoid the fluid in the reservoir and/or pressure chamber, when in fluid communication with the reservoir, from flowing into the cylinder in the opposite direction to the pressure chamber.
  • the secondary gasket serves the function of hydraulically isolating the electromechanical components accommodated in the cylinder on the side opposite to the pressure chamber, and/or preventing leakages of hydraulic fluid from the pressure chamber.
  • the primary gasket is adapted to keep the fluid pressurized in the pressure chamber, preventing fluid passages from the pressure chamber to the reservoir when the float is in an advanced position in the cylinder.
  • the primary gasket is in a fluid isolation configuration, with a back portion thereof abutting against a first radial wall of primary housing.
  • At least one valve which increases the pressure in the reservoir is opened in order to trigger a flow of fluid from the reservoir to the pressure chamber, avoiding the primary gasket from preventing such a fluid passage, thus increasing the pressure in the pressure chamber.
  • the primary gasket is a three-lip gasket comprising an inner lip, a central lip, and an outer lip which project from the back portion to be radially and mutually spaced apart.
  • the inner lip is configured to form a seal with the float.
  • the outer lip is configured to form a seal with an outer wall of the primary housing when the pressure in the pressure chamber is higher than the pressure in the reservoir, thus fluidically isolating the pressure chamber and the reservoir.
  • the outer lip is configured to bend toward the central lip moving away from the outer wall of the housing when the pressure in the reservoir is higher than the pressure in the pressure chamber, thus allowing a fluid communication between the reservoir and the pressure chamber.
  • the primary gasket When the reservoir pressure exceeds the pressure chamber pressure, the primary gasket is configured to slide axially in the primary housing from the fluid isolation configuration to a fluid communication configuration, thus axially abutting with the central lip against a second radial wall of primary housing axially opposite to said first radial wall. Moreover, the central lip is configured to bend toward the inner lip, allowing the reservoir and the pressure chamber to be fluidically connected, thus allowing the pressure in the pressure chamber to be increased.
  • the primary gasket is configured to slide axially to the fluid isolation configuration, abutting with the back portion against the first radial wall until it fluidically isolates the reservoir and the pressure chamber.
  • a primary gasket for a cylinder assembly is indicated by reference numeral 1.
  • Said cylinder assembly 100 comprises a cylinder 101 and a float 102 slidingly accommodated in a float housing 104 delimited by a cylinder wall 103 of said cylinder 101 for pressurizing a fluid.
  • said cylinder assembly 100 is a brake master cylinder or an electro-hydraulic actuator.
  • said electro-hydraulic actuator is a linear actuator.
  • the primary gasket 1 comprises an annular body 2, which extends circumferentially at least along a circumferential direction C-C about an axial direction X-X, where said primary gasket 1 defines a radial direction R-R perpendicular to said axial direction X-X and said circumferential direction C-C.
  • Said annular body 2 is configured to be accommodated in a primary gasket housing 105 defined in said cylinder wall 103.
  • the primary gasket housing 105 is delimited radially by an axial housing wall 107 and axially by a first radial housing wall 108 and a second radial housing wall 109, connected to said axial housing wall 107, forming an annular housing.
  • Said annular body 2 comprises an inner lip 4, a central lip 5, an outer lip 6, and a back portion 3.
  • the back portion 3 comprises a back abutment surface 13 configured to abut against the first radial housing wall 108 of said primary gasket housing 105.
  • the inner lip 4, the central lip 5, and the outer lip 6 extend from the back portion 3 in the axial direction X-X spaced from one another in the radial direction R-R from the opposite side of the back abutment surface 13.
  • the inner lip 4 is configured to form a preferably dynamic and static seal on the float 102.
  • the outer lip 6 is configured to form a seal with said axial housing wall 107.
  • the central lip 5 comprises an annular lip body 14, which extends axially between said back portion 3 and a central lip edge 15.
  • the annular lip body 14 has a central lip thickness S along said radial direction R-R.
  • the central lip edge 15 comprises at least one central lip abutment portion 7 configured to abut against the second radial wall 109.
  • the central lip 5 comprises at least one radial opening 9. Said at least one radial opening 9 passes through the central lip thickness S defining a closed side opening profile 8 in said annular body 14.
  • said central lip 5 comprises at least one side opening wall 10, where said at least one side opening wall 10 seamlessly delimits said at least one radial opening 9.
  • said central lip 5 comprises a radially inner axial surface 17 and a radially outer axial surface 18, facing said inner lip 4 and said outer lip 6, respectively.
  • each side opening wall 10 extends mainly radially from said radially inner axial surface 17 to said radially outer axial surface 18 avoiding the interference with said central lip edge 15 and defining said closed side opening profile 8.
  • each radial opening 9 has a respective opening axis B-B, where each opening 9 is delimited seamlessly about the respective opening axis B-B by a respective opening side wall 10 of said annular lip body 14.
  • each radial opening 9 has a respective opening diameter D.
  • said closed side opening profile 8 is cylindrical or prismatic in shape.
  • said closed side opening profile 8 is defined by a side opening wall 10 of said annular lip body 14, which extends at least radially from said central lip thickness S, where said respective side opening wall 10 has a cylindrical extension about said opening axis B-B or comprises a plurality of side walls laterally delimiting a hollow prism.
  • said opening diameter D is at least equal to said central lip thickness S.
  • each opening axis B-B is axially spaced apart from said central lip edge 15 by a distance less than twice the value of said opening diameter D.
  • each opening axis B-B is axially spaced apart from said back abutment surface 13 by a distance equal to at least three times the value of said opening diameter D, preferably between four times and six times the value of said opening diameter D.
  • the central lip 5 comprises a plurality of said at least one radial opening 9, where said radial openings 9 are circumferentially spaced apart from one another on said central lip 5.
  • each radial opening 9 is circumferentially spaced apart from one neighboring first radial opening of said radial openings 9 by a distance equal to at least the value of said diameter D, preferably equal to at least three times the value of said diameter D.
  • the distance between two neighboring first openings is understood as the distance between the respective opening axes B-B.
  • said radial openings 9 are evenly distributed circumferentially over said annular lip body 14.
  • the number of said radial openings 9 is between 10 and 100, preferably between 20 and 50, preferably 30.
  • said at least one central lip abutment portion 7 configured to abut against the second radial wall 109 extends seamlessly along the central lip edge 15 forming a continuous annular abutment portion.
  • said central lip edge 15 is an annular edge, avoiding comprising flat surfaces perpendicular to the axial direction.
  • the central lip is tapered in the axial direction, e.g., close to the central lip edge 15.
  • the inner lip 4 and the outer lip 6 have substantially the same axial size in the axial direction X-X, where the central lip 5 has a greater axial size in the axial direction X-X than the axial size of the outer lip and the inner lip, being less than the central lip thickness S.
  • said annular body 2 is made of polymer material for gaskets, e.g., gasket rubber, preferably EPDM (Ethylene-Propylene Diene Monomer).
  • the present invention also relates to a cylinder assembly 100 for a braking system.
  • Said cylinder assembly 100 comprises a cylinder 101.
  • Said cylinder 101 comprises a cylinder wall 103 internally delimiting a float housing 104.
  • Said cylinder wall 103 delimits a pressure chamber fluidically connectable to a braking device.
  • Said cylinder wall 103 delimits a primary gasket housing 105 and a secondary gasket housing 106.
  • Said cylinder 101 defines a supply conduit 111 fluidically connectable to a reservoir and/or a fluid feeding valve, where said supply conduit 111 leads into a supply opening 112 on said cylinder wall 103 between said primary gasket housing 105 and said secondary gasket housing 106.
  • Said cylinder assembly 100 comprises a float 102.
  • the float 102 is slidingly accommodated in a sealing manner in the float housing 104 to pressurize a fluid in a pressure chamber 110 fluidically connectable to a braking device.
  • Said cylinder assembly 100 comprises a primary gasket 1 according to any one of the previously described embodiments.
  • the primary gasket 1 is accommodated in said primary gasket housing 105 with axial clearance between said first radial housing wall 108 and second said radial housing wall 109.
  • the primary gasket 1 abuts against said first radial housing wall 108, it forms a seal with said float 102 and said axial wall 107 of primary housing thus fluidically isolating the pressure chamber and the supply conduit 111.
  • the primary gasket 1 When the primary gasket 1 abuts against said second radial housing wall 109, it forms a seal with said float 102 avoiding the formation of a seal with the axial wall 107 of the primary housing to fluidically connect the supply conduit 111 and the pressure chamber 110 to increase the fluid pressure.
  • Said cylinder assembly 100 comprises a secondary gasket 115 accommodated in the secondary gasket housing 106 to form a static and dynamic seal with said float and said cylinder wall 103.
  • said secondary gasket 115 is a two-lip gasket.
  • said cylinder assembly 100 is a brake master cylinder.
  • said cylinder assembly 100 is an electro-hydraulic actuator.
  • said electro-hydraulic actuator is an actuator for BBW (Brake By Wire) applications.
  • said cylinder assembly 100 comprises an actuator motor 113.
  • said cylinder assembly 100 comprises an elastic element 114 accommodated inside said cylinder 101, which constantly biases said float 102 in the opposite direction to a float advancement direction.
  • the float 102 is axially movable between a resting configuration and at least one advanced configuration to pressurize a fluid, such as a brake fluid, in the pressure chamber.
  • the primary gasket 1 is axially movable in the primary gasket housing between a fluid isolation configuration, in which the back portion 3 abuts against the first radial housing wall and the outer lip forms a seal with the axial wall and the inner lip forms a seal with the float 102, and a fluid communication configuration, in which the protuberances 10, 9 abut against the second radial housing wall and the outer lip is spaced apart from the axial wall and the inner lip forms a seal with the float 102.
  • the float comprises a float body having a hollow portion delimited by a float wall, where the hollow portion is in fluid connection with the pressure chamber, where the float wall has a through opening.
  • the pressure chamber is in fluid communication with said supply conduit through said through opening.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Transmission Of Braking Force In Braking Systems (AREA)
  • Sealing Devices (AREA)

Claims (10)

  1. Primärdichtung (1) für eine Zylinderanordnung (100), wobei die Zylinderanordnung (100) einen Zylinder (101) und einen Schwimmer (102) umfasst, der gleitend in einem Schwimmergehäuse (104) aufgenommen ist, das durch eine Zylinderwand (103) des Zylinders (101) begrenzt ist, zum Druckbeaufschlagen eines Fluids,
    wobei die Primärdichtung (1) einen ringförmigen Körper (2) umfasst, der sich in Umfangsrichtung zumindest entlang einer Umfangsrichtung (C-C) um eine axiale Richtung (X-X) erstreckt, wobei die Primärdichtung (1) eine radiale Richtung (R-R) senkrecht zur axialen Richtung (X-X) und zur Umfangsrichtung (C-C) definiert,
    wobei der ringförmige Körper (2) ausgelegt ist, um in einem Primärdichtungsgehäuse (105) aufgenommen zu werden, das in der Zylinderwand (103) definiert ist, wobei das Primärdichtungsgehäuse (105) radial durch eine axiale Gehäusewand (107) und axial durch eine erste radiale Gehäusewand (108) und eine zweite radiale Gehäusewand (109), die mit der axialen Gehäusewand (107) verbunden sind, begrenzt ist,
    wobei der ringförmige Körper (2) eine innere Lippe (4), eine mittlere Lippe (5), eine äußere Lippe (6) und einen hinteren Abschnitt (3) umfasst,
    wobei der hintere Abschnitt (3) eine hintere Anlagefläche (13) umfasst, die ausgelegt ist, um an der ersten radialen Gehäusewand (108) des Primärdichtungsgehäuses (105) anzuliegen,
    wobei sich die innere Lippe (4), die mittlere Lippe (5) und die äußere Lippe (6) axial von dem hinteren Abschnitt (3) auf der der hinteren Anlagefläche (13) gegenüberliegenden Seite radial voneinander beabstandet erstrecken,
    wobei die innere Lippe (4) ausgelegt ist, um eine Dichtung mit dem Schwimmer (102) zu bilden, wobei die äußere Lippe (6) ausgelegt ist, um eine Dichtung mit der axialen Gehäusewand (107) zu bilden,
    wobei die mittlere Lippe (5) einen ringförmigen Lippenkörper (14) umfasst, der sich axial zwischen dem hinteren Abschnitt (3) und einem mittleren Lippenrand (15) erstreckt, wobei der ringförmige Lippenkörper (14) eine mittlere Lippendicke (S) entlang der radialen Richtung (R-R) aufweist, wobei der mittlere Lippenrand (15) mindestens einen mittleren Lippenanlageabschnitt (7) umfasst, der ausgelegt ist, um an der zweiten radialen Wand (109) anzuliegen, wobei die mittlere Lippe (5) mindestens eine radiale Öffnung (9) umfasst,
    gekennzeichnet dadurch, dass
    die mindestens eine radiale Öffnung (9) durch die mittlere Lippendicke (S) hindurchgeht, wodurch ein geschlossenes Seitenöffnungsprofil (8) in dem ringförmigen Körper (14) definiert wird.
  2. Primärdichtung (1) nach dem vorhergehenden Anspruch,
    wobei die mittlere Lippe (5) mindestens eine Seitenöffnungswand (10) umfasst, wobei die mindestens eine Seitenöffnungswand (10) die mindestens eine radiale Öffnung (9) nahtlos begrenzt,
    wobei die mittlere Lippe (5) eine radial innere axiale Fläche (17) und eine radial äußere axiale Fläche (18) umfasst, die jeweils der inneren Lippe (4) und der äußeren Lippe (6) zugewandt sind,
    wobei sich jede Seitenöffnungswand (10) vorwiegend und radial von der radial inneren axialen Fläche (17) zu der radial äußeren axialen Fläche (18) erstreckt, wobei eine Beeinträchtigung des mittleren Lippenrands (15) vermieden wird und das geschlossene Öffnungsseitenprofil (8) definiert wird.
  3. Primärdichtung (1) nach einem der vorhergehenden Ansprüche, umfassend eines oder mehrere der folgenden Merkmale oder eine Kombination davon:
    ∘ wobei jede radiale Öffnung (9) eine jeweilige Öffnungsachse (B-B) aufweist, wobei jede Öffnung (9) um die jeweilige Öffnungsachse (B-B) nahtlos durch eine jeweilige Öffnungsseitenwand (10) des ringförmigen Lippenkörpers (14) begrenzt ist;
    ∘ und/oder
    ∘ wobei jede radiale Öffnung (9) einen jeweiligen Öffnungsdurchmesser (D) aufweist; und/oder
    ∘ wobei das geschlossene Seitenöffnungsprofil (8) entweder eine zylindrische oder eine prismatische Form aufweist; und/oder
    ∘ wobei das geschlossene Seitenöffnungsprofil (8) durch eine Seitenöffnungswand (10) des ringförmigen Lippenkörpers (14) definiert ist, die sich zumindest radial zu der mittleren Lippendicke (S) erstreckt, wobei die jeweilige Seitenöffnungswand (10) eine zylindrische Erstreckung um die Öffnungsachse (B-B) aufweist oder eine Vielzahl von Seitenwänden umfasst, die ein Hohlprisma seitlich begrenzen·
  4. Primärdichtung (1) nach dem vorhergehenden Anspruch, umfassend eines oder mehrere der folgenden Merkmale oder eine Kombination davon:
    ∘ wobei jede Öffnungsachse (B-B) von dem mittleren Lippenrand (15) um einen Abstand axial beabstandet ist, der kleiner als der zweifache Wert des Öffnungsdurchmessers (D) ist, und/oder
    ∘ wobei jede Öffnungsachse (B-B) von der hinteren Anlagefläche (13) um einen Abstand axial beabstandet ist, der mindestens gleich dem dreifachen Wert des Öffnungsdurchmessers (D) ist, vorzugsweise zwischen dem vierfachen und dem sechsfachen Wert des Öffnungsdurchmessers (D) liegt,
    ∘ wobei der Öffnungsdurchmesser (D) mindestens gleich der mittleren Lippendicke (S) ist.
  5. Primärdichtung (1) nach einem der vorhergehenden Ansprüche,
    wobei die mittlere Lippe (5) eine Vielzahl der mindestens einen radialen Öffnung (9) umfasst, wobei die radialen Öffnungen (9) in Umfangsrichtung voneinander auf der mittleren Lippe (5) beabstandet sind.
  6. Primärdichtung (1) nach dem vorhergehenden Anspruch,
    wobei jede radiale Öffnung (9) von einer ihrer radialen Öffnungen, die nahe an den radialen Öffnungen (9) liegt, in Umfangsrichtung um einen Abstand beabstandet ist, der mindestens gleich dem Wert des Durchmessers (D) ist, vorzugsweise mindestens gleich dem dreifachen Wert des Durchmessers (D) ist.
  7. Primärdichtung (1) nach einem der Ansprüche 5 bis 6, umfassend eines oder mehrere der folgenden Merkmale oder eine Kombination davon:
    ∘ wobei die radialen Öffnungen (9) gleichmäßig in Umfangsrichtung über den ringförmigen Lippenkörper (14) verteilt sind, und/oder
    ∘ wobei von 10 bis 100 der radialen Öffnungen (9) vorhanden sind, vorzugsweise von 20 bis 50, vorzugsweise 30.
  8. Primärdichtung (1) nach einem der vorhergehenden Ansprüche, wobei sich der mindestens eine mittlere Lippenanlageabschnitt (7), der ausgelegt ist, an der zweiten radialen Wand (109) anzuliegen, nahtlos entlang dem mittleren Lippenrand (15) erstreckt, wodurch ein durchgehender ringförmiger Anlageabschnitt gebildet wird.
  9. Zylinderanordnung (100) für ein Bremssystem, umfassend
    einen Zylinder (101) wobei der Zylinder (101) eine Zylinderwand (103) umfasst, die innen ein Schwimmergehäuse (104) begrenzt,
    eine Druckkammer (110), die die Zylinderwand (103) begrenzt , die fluidisch mit einer Bremsvorrichtung verbindbar ist,
    wobei die Zylinderwand (103) ein Primärdichtungsgehäuse (105) und ein Sekundärdichtungsgehäuse (106) begrenzt, wobei das Primärdichtungsgehäuse (105) radial durch eine axiale Gehäusewand (107) und axial durch eine erste radiale Gehäusewand (108) und eine zweite radiale Gehäusewand (109), die mit der axialen Gehäusewand (107) verbunden sind, begrenzt ist,
    wobei der Zylinder (101) eine Zufuhrleitung (111) definiert, die fluidisch mit einem Behälter und/oder einem Fluidzufuhrventil verbindbar ist,
    wobei die Zufuhrleitung (111) in eine Zufuhröffnung (112) an der Zylinderwand (103) zwischen dem Primärdichtungsgehäuse (105) und dem Sekundärdichtungsgehäuse (106) mündet,
    einen Schwimmer (102),
    wobei der Schwimmer (102) gleitend und abdichtend in dem Schwimmergehäuse (104) aufgenommen ist, um das Fluid in der Druckkammer (110), die fluidisch mit einer Bremsvorrichtung verbindbar ist, druckzubeaufschlagen,
    - eine Primärdichtung (1) nach einem der vorhergehenden Ansprüche,
    wobei die Primärdichtung (1) in dem Primärdichtungsgehäuse (105) mit einem axialen Spiel zwischen der ersten radialen Gehäusewand (108) und der zweiten radialen Gehäusewand (109) aufgenommen ist,
    wobei die Primärdichtung (1), wenn sie an der ersten radialen Gehäusewand (108) anliegt, ausgelegt ist, um eine Dichtung mit dem Schwimmer (102) und der axialen Wand (107) des Primärgehäuses zu bilden, wodurch die Druckkammer und die Zufuhrleitung (111) fluidisch isoliert werden, und wobei die Primärdichtung (1), wenn sie an der zweiten radialen Wand (109) anliegt, ausgelegt ist, um eine Dichtung mit dem Schwimmer (102) zu bilden, wobei die Bildung einer Dichtung mit der axialen Wand (107) des Primärgehäuses, die an der zweiten radialen Gehäusewand (109) anliegt, verhindert wird, um die Zufuhrleitung (111) und die Druckkammer (110) fluidisch zu verbinden, um den Fluiddruck in der Druckkammer zu erhöhen,
    eine Sekundärdichtung (115), die in dem Sekundärdichtungsgehäuse (106) aufgenommen ist, um eine statische und dynamische Dichtung mit dem Schwimmer (102) und der Zylinderwand (103) zu bilden.
  10. Zylinderanordnung (100) nach dem vorhergehenden Anspruch,
    wobei die Zylinderanordnung (100) ein Hauptzylinder oder ein Aktuator ist, vorzugsweise für elektrohydraulische BBW- (Brake By Wire) Anwendungen.
EP23729170.3A 2022-05-13 2023-05-10 Primärdichtung für eine zylindereinheit, zylindereinheit Active EP4522468B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102022000009953A IT202200009953A1 (it) 2022-05-13 2022-05-13 Guarnizione primaria per assieme di cilindro, assieme di cilindro
PCT/IB2023/054822 WO2023218366A1 (en) 2022-05-13 2023-05-10 Primary gasket for a cylinder assembly, cylinder assembly

Publications (2)

Publication Number Publication Date
EP4522468A1 EP4522468A1 (de) 2025-03-19
EP4522468B1 true EP4522468B1 (de) 2025-12-10

Family

ID=82942932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23729170.3A Active EP4522468B1 (de) 2022-05-13 2023-05-10 Primärdichtung für eine zylindereinheit, zylindereinheit

Country Status (6)

Country Link
US (1) US20250320921A1 (de)
EP (1) EP4522468B1 (de)
KR (1) KR20250007673A (de)
CN (1) CN119365372A (de)
IT (1) IT202200009953A1 (de)
WO (1) WO2023218366A1 (de)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3955859A (en) * 1975-03-25 1976-05-11 The Torrington Company Bearing with multiple lip seal
DE4223671A1 (de) * 1992-07-17 1994-01-20 Busak & Luyken Gmbh & Co Dichtungsanordnung
KR101055972B1 (ko) * 2005-12-12 2011-08-11 주식회사 만도 마스터 실린더
DE102006028467A1 (de) * 2006-06-21 2008-02-07 Busak + Shamban Deutschland Gmbh Dichtung und Dichtungsanordnung
CN201015990Y (zh) * 2006-12-14 2008-02-06 吉林汽车制动器厂 新型柱塞式制动主缸用主皮碗
JP5326384B2 (ja) * 2008-07-03 2013-10-30 Ｎｏｋ株式会社 密封装置
CN202280839U (zh) * 2011-11-04 2012-06-20 上海唯万密封科技有限公司 双唇骨架防尘圈
WO2014119611A1 (ja) * 2013-01-31 2014-08-07 日立オートモティブシステムズ株式会社 マスタシリンダ

Also Published As

Publication number Publication date
WO2023218366A1 (en) 2023-11-16
KR20250007673A (ko) 2025-01-14
US20250320921A1 (en) 2025-10-16
IT202200009953A1 (it) 2023-11-13
CN119365372A (zh) 2025-01-24
EP4522468A1 (de) 2025-03-19

Similar Documents

Publication Publication Date Title
EP1998066B1 (de) Bremssattel
US5711151A (en) Brake-pressure modulation device
EP0387012B1 (de) Stellglied für Druckflüssigkeit
US7866155B2 (en) Master cylinder and method of manufacturing the same
US8991171B2 (en) Cup of a master cylinder, advantageously a tandem master cylinder and tandem master cylinder provided with such cups
EP0728087B1 (de) Hydraulischer hauptzylinder
US6712362B2 (en) Primary seals for master-slave cylinder systems
US4878419A (en) Lightweight hydraulic actuator
EP0140779B1 (de) Hauptzylinder
US20250320921A1 (en) Primary gasket for a cylinder assembly, cylinder assembly
EP4522892B1 (de) Primärdichtung für eine zylindereinheit, zylindereinheit
EP2125468B1 (de) Membrane für druckmittelbetätigte bremszylinder mit zentrierring
EP4519131B1 (de) Drucksteuerungsvorrichtung, bremssystem, steuerungsverfahren
US4964274A (en) Hydraulic pressure generator
EP2749462A1 (de) Hydraulisches Bremssystem und Verfahren der Bremsverstärkung in einem Kraftfahrzeug
US3731487A (en) Master cylinder
US3645494A (en) Valve for fluid-actuated brake system
CN115782842B (zh) 一种制动主缸总成
US3973473A (en) Shoe-drum brakes for vehicles
WO2025022298A1 (en) Primary gasket for a cylinder assembly, and cylinder assembly
GB2054076A (en) Pressure reducing device for vehicular hydraulic brake systems
EP0020206B1 (de) Schnell füllender Hauptzylinder
EP3738847B1 (de) Federbremsaktuator für ein fahrzeug, insbesondere ein nutzfahrzeug
HU185698B (en) Packing construction for pneumatic and hydraulic control apparatuses
CZ396097A3 (cs) Hydraulická jednotka převodníku tlaku, zejména pro lis, pracující způsobem přetváření vysokým vnitřním tlakem

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20241112

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20250827

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: CH

Ref legal event code: F10

Free format text: ST27 STATUS EVENT CODE: U-0-0-F10-F00 (AS PROVIDED BY THE NATIONAL OFFICE)

Effective date: 20251210

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602023009604

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20251210

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20260310

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20251210

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20251210

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20251210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20260310

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20251210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20251210

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1865908

Country of ref document: AT

Kind code of ref document: T

Effective date: 20251210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20251210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20251210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20251210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20251210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20251210

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20260521

Year of fee payment: 4

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20251210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20251210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20260410

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20260410

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20251210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20251210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20251210